Localised flooding is expected to impact on parts of the south-east this weekend as ex-tropical cyclone Oswald continues moving south.

Queensland Premier Campbell Newman says the main concern for Brisbane and Gold and Sunshine Coasts residents is suburban creek flooding and storm water drain flooding as 200-300 millimetres is expected to fall across the region in the coming days.

Bureau of Meteorology Forecaster Rob Webb says the tropical low is remaining on the coast, and residents in Queensland's south-east need to keep up to date with warnings.

"We do look to see the potential for flash flooding in those areas, local flash flooding, particularly in urban areas, but I will stress that the condition is developing and as it develops we'll be watching closely and I'm urging people to keep an eye on the latest forecasts and warnings," he says.

The bureau's senior forecaster Brett Harrison says the heaviest falls are expected on Sunday in the Wide Bay and Burnett and Southeast coast districts.

Storm surges combined with high tides may make conditions dangerous and low lying coastal areas could be inundated.

Gate releases from Wivenhoe Dam are expected to continue for several days until the dam level reaches 88%.

Releases from Wivenhoe Dam will impact Savages Crossing, Twin Bridges and Colleges Crossing. No urban flooding is expected from these controlled releases however residents should contact their local councils for information on flood impacts in their area.

Gate releases from North Pine Dam are expected to continue overnight, impacting Youngs Crossing. Residents should contact their local council for information on flood impacts in their area.

Brisbane Lord Mayor Graham Quirk is warning residents to be alert but not alarmed about the wild weather expected in parts of Brisbane across the weekend.

The Brisbane City Council is concerned about low lying catchments around Brisbane that may receive continued heavy rainfall across the weekend.

Cnr Quirk says sandbags will be available at council depots from Friday morning for those residents wanting to take precautionary action, particularly those in low-lying areas around creek catchments such as Norman Creek, Bulimba Creek, Breakfast/Enoggera Creek, Zilman Waterhole (Boondall), Stable Swamp/Oxley Creek and Cabbage Tree Creek.

Sandbags are available at:

Darra Works Depot, Shamrock Street

Morningside Works Depot, 9 Redfern Street

Virginia Depot, Lathe Street

Newmarket SES Depot, 66 Wilston Road Newmarket

They are also available at SES depots in Arana Hills, Bribie Island, Caboolture, Deception Bay, Petrie, Redcliffe and Woodford.

Sandbags for Gold and Sunshine Coast

Residents on the Gold and Sunshine Coast are advised to call the SES on 132 500 if they require sandbagging assistance.